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Question
Identify the correct formula of halides of alkaline earth metals from the following.
(i) BaCl2.2H2O
(ii) BaCl2.4H2O
(iii) CaCl2.6H2O
(iv) SrCl2.4H2O
Solution
(i) BaCl2.2H2O
(iii) CaCl2.6H2O
Explanation:
Tendency to form halide hydrates gradually decreases down the group. The hydrates are MgCl2.6H2O, CaCl2.6H2O, SrCl2.6H2O and BaCl2.2H2O.
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